libmemif: remove old examples

Type: refactor

Signed-off-by: Jakub Grajciar <jgrajcia@cisco.com>
Change-Id: I2331f6fb43ca533afb32f7d448adda27b19689ac

1 files changed, 0 insertions, 914 deletions

diff --git a/extras/libmemif/examples/icmp_responder-mt/main.c b/extras/libmemif/examples/icmp_responder-mt/main.c
deleted file mode 100644
index f37c6a026fb..00000000000
--- a/extras/libmemif/examples/icmp_responder-mt/main.c
+++ /dev/null
@@ -1,914 +0,0 @@
-/*
- *------------------------------------------------------------------
- * Copyright (c) 2017 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *------------------------------------------------------------------
- */
-
-#include <stdlib.h>
-#include <stdint.h>
-#include <net/if.h>
-#include <sys/types.h>
-#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <sys/uio.h>
-#include <sys/mman.h>
-#include <sys/prctl.h>
-#include <inttypes.h>
-#include <string.h>
-#include <stdio.h>
-#include <netdb.h>
-#include <linux/ip.h>
-#include <linux/icmp.h>
-#include <arpa/inet.h>
-#include <stdlib.h>
-#include <netinet/if_ether.h>
-#include <net/if_arp.h>
-#include <asm/byteorder.h>
-#include <byteswap.h>
-#include <string.h>
-#include <sys/epoll.h>
-#include <errno.h>
-#include <unistd.h>
-#include <signal.h>
-#include <pthread.h>
-
-#include <libmemif.h>
-#include <icmp_proto.h>
-
-#define APP_NAME "ICMP_Responder"
-#define IF_NAME  "memif_connection"
-
-
-#ifdef ICMP_DBG
-#define DBG(...) do {                                               \
-                    printf (APP_NAME":%s:%d: ", __func__, __LINE__);         \
-                    printf (__VA_ARGS__);                           \
-                    printf ("\n");                                  \
-                } while (0)
-#else
-#define DBG(...)
-#endif
-
-#define INFO(...) do {                                              \
-                    printf ("INFO: "__VA_ARGS__);                   \
-                    printf ("\n");                                  \
-                } while (0)
-
-/* maximum tx/rx memif buffers */
-#define MAX_MEMIF_BUFS  256
-#define MAX_CONNS       50
-#define MAX_QUEUES      2
-#define MAX_THREADS     ((MAX_CONNS) * (MAX_QUEUES))
-
-int main_epfd;
-
-typedef struct
-{
-  /* thread id */
-  uint8_t id;
-  /* memif connection index */
-  uint16_t index;
-  /* id of queue to be handled by thread */
-  uint8_t qid;
-  uint8_t isRunning;
-
-  uint16_t rx_buf_num;
-  uint16_t tx_buf_num;
-  memif_buffer_t *rx_bufs;
-  memif_buffer_t *tx_bufs;
-} memif_thread_data_t;
-
-typedef struct
-{
-  uint16_t index;
-  /* memif connection handle */
-  memif_conn_handle_t conn;
-  /* interface ip address */
-  uint8_t ip_addr[4];
-  /* inform pthread about connection termination */
-  uint8_t pending_del;
-} memif_connection_t;
-
-memif_connection_t memif_connection[MAX_CONNS];
-long ctx[MAX_CONNS];
-
-/* thread data specific for each thread */
-memif_thread_data_t thread_data[MAX_THREADS];
-pthread_t thread[MAX_THREADS];
-
-void
-user_signal_handler (int sig)
-{
-}
-
-static void
-print_memif_details ()
-{
-  memif_details_t md;
-  ssize_t buflen;
-  char *buf;
-  int err, i, e, ti;
-  buflen = 2048;
-  buf = malloc (buflen);
-  printf ("MEMIF DETAILS\n");
-  printf ("==============================\n");
-  for (i = 0; i < MAX_CONNS; i++)
-    {
-      memif_connection_t *c = &memif_connection[i];
-
-      memset (&md, 0, sizeof (md));
-      memset (buf, 0, buflen);
-
-      err = memif_get_details (c->conn, &md, buf, buflen);
-      if (err != MEMIF_ERR_SUCCESS)
-	{
-	  if (err != MEMIF_ERR_NOCONN)
-	    INFO ("%s", memif_strerror (err));
-	  continue;
-	}
-
-      printf ("interface index: %d\n", i);
-
-      printf ("\tinterface ip: %u.%u.%u.%u\n",
-	      c->ip_addr[0], c->ip_addr[1], c->ip_addr[2], c->ip_addr[3]);
-      printf ("\tinterface name: %s\n", (char *) md.if_name);
-      printf ("\tapp name: %s\n", (char *) md.inst_name);
-      printf ("\tremote interface name: %s\n", (char *) md.remote_if_name);
-      printf ("\tremote app name: %s\n", (char *) md.remote_inst_name);
-      printf ("\tid: %u\n", md.id);
-      printf ("\tsecret: %s\n", (char *) md.secret);
-      printf ("\trole: ");
-      if (md.role)
-	printf ("slave\n");
-      else
-	printf ("master\n");
-      printf ("\tmode: ");
-      switch (md.mode)
-	{
-	case 0:
-	  printf ("ethernet\n");
-	  break;
-	case 1:
-	  printf ("ip\n");
-	  break;
-	case 2:
-	  printf ("punt/inject\n");
-	  break;
-	default:
-	  printf ("unknown\n");
-	  break;
-	}
-      printf ("\tsocket filename: %s\n", (char *) md.socket_filename);
-      printf ("\trx queues:\n");
-      for (e = 0; e < md.rx_queues_num; e++)
-	{
-	  ti = (i * MAX_QUEUES) + e;
-	  printf ("\tqueue id: %u\n", md.rx_queues[e].qid);
-	  printf ("\t\tring size: %u\n", md.rx_queues[e].ring_size);
-	  printf ("\t\tbuffer size: %u\n", md.rx_queues[e].buffer_size);
-	  printf ("\t\tthread id: %u\n", thread_data[ti].id);
-	  printf ("\t\tthread connection index: %u\n", thread_data[ti].index);
-	  printf ("\t\tthread running: ");
-	  if (thread_data[ti].isRunning)
-	    printf ("yes\n");
-	  else
-	    printf ("no");
-	}
-      printf ("\ttx queues:\n");
-      for (e = 0; e < md.tx_queues_num; e++)
-	{
-	  printf ("\tqueue id: %u\n", md.tx_queues[e].qid);
-	  printf ("\t\tring size: %u\n", md.tx_queues[e].ring_size);
-	  printf ("\t\tbuffer size: %u\n", md.tx_queues[e].buffer_size);
-	}
-      printf ("\tlink: ");
-      if (md.link_up_down)
-	printf ("up\n");
-      else
-	printf ("down\n");
-    }
-  free (buf);
-}
-
-int
-add_epoll_fd (int epfd, int fd, uint32_t events)
-{
-  if (fd < 0)
-    {
-      DBG ("invalid fd %d", fd);
-      return -1;
-    }
-  struct epoll_event evt;
-  memset (&evt, 0, sizeof (evt));
-  evt.events = events;
-  evt.data.fd = fd;
-  if (epoll_ctl (epfd, EPOLL_CTL_ADD, fd, &evt) < 0)
-    {
-      DBG ("epoll_ctl: %s fd %d", strerror (errno), fd);
-      return -1;
-    }
-  DBG ("fd %d added to epoll", fd);
-  return 0;
-}
-
-int
-mod_epoll_fd (int epfd, int fd, uint32_t events)
-{
-  if (fd < 0)
-    {
-      DBG ("invalid fd %d", fd);
-      return -1;
-    }
-  struct epoll_event evt;
-  memset (&evt, 0, sizeof (evt));
-  evt.events = events;
-  evt.data.fd = fd;
-  if (epoll_ctl (epfd, EPOLL_CTL_MOD, fd, &evt) < 0)
-    {
-      DBG ("epoll_ctl: %s fd %d", strerror (errno), fd);
-      return -1;
-    }
-  DBG ("fd %d modified on epoll", fd);
-  return 0;
-}
-
-int
-del_epoll_fd (int epfd, int fd)
-{
-  if (fd < 0)
-    {
-      DBG ("invalid fd %d", fd);
-      return -1;
-    }
-  struct epoll_event evt;
-  memset (&evt, 0, sizeof (evt));
-  if (epoll_ctl (epfd, EPOLL_CTL_DEL, fd, &evt) < 0)
-    {
-      DBG ("epoll_ctl: %s fd %d", strerror (errno), fd);
-      return -1;
-    }
-  DBG ("fd %d removed from epoll", fd);
-  return 0;
-}
-
-void *
-memif_rx_poll (void *ptr)
-{
-  memif_thread_data_t *data = (memif_thread_data_t *) ptr;
-  memif_connection_t *c = &memif_connection[data->index];
-  int err;
-  uint16_t rx = 0, tx = 0, fb = 0;
-
-  data->rx_bufs = malloc (sizeof (memif_buffer_t) * MAX_MEMIF_BUFS);
-  data->tx_bufs = malloc (sizeof (memif_buffer_t) * MAX_MEMIF_BUFS);
-  data->rx_buf_num = 0;
-  data->tx_buf_num = 0;
-
-  data->isRunning = 1;
-  INFO ("pthread id %u starts in polling mode", data->id);
-
-  while (1)
-    {
-      if (c->pending_del)
-	goto close;
-
-      /* receive data from shared memory buffers */
-      err =
-	memif_rx_burst (c->conn, data->qid, data->rx_bufs, MAX_MEMIF_BUFS,
-			&rx);
-      if (err != MEMIF_ERR_SUCCESS)
-	{
-	  INFO ("memif_rx_burst: %s", memif_strerror (err));
-	  data->rx_buf_num += rx;
-	  goto error;
-	}
-      data->rx_buf_num += rx;
-      if (rx == 0)
-	{
-	  continue;
-	}
-
-      DBG ("thread id: %u", data->id);
-
-      DBG ("received %d buffers. %u/%u alloc/free buffers",
-	   rx, data->rx_buf_num, MAX_MEMIF_BUFS - data->rx_buf_num);
-
-      err =
-	memif_buffer_alloc (c->conn, data->qid, data->tx_bufs,
-			    data->rx_buf_num, &tx, 0);
-      if (err != MEMIF_ERR_SUCCESS)
-	{
-	  INFO ("memif_buffer_alloc: %s", memif_strerror (err));
-	  data->tx_buf_num += tx;
-	  goto error;
-	}
-      data->tx_buf_num += tx;
-      DBG ("allocated %d/%d buffers, %u free buffers",
-	   tx, data->rx_buf_num, MAX_MEMIF_BUFS - data->tx_buf_num);
-
-      int i;
-      for (i = 0; i < rx; i++)
-	{
-	  resolve_packet ((void *) (data->rx_bufs + i)->data,
-			  (data->rx_bufs + i)->len,
-			  (void *) (data->tx_bufs + i)->data,
-			  &(data->tx_bufs + i)->len, c->ip_addr);
-	}
-
-      /* mark memif buffers and shared memory buffers as free */
-      err = memif_refill_queue (c->conn, data->qid, rx, 0);
-      if (err != MEMIF_ERR_SUCCESS)
-	INFO ("memif_buffer_free: %s", memif_strerror (err));
-      data->rx_buf_num -= fb;
-
-      DBG ("freed %d buffers. %u/%u alloc/free buffers",
-	   fb, data->rx_buf_num, MAX_MEMIF_BUFS - data->rx_buf_num);
-
-      err =
-	memif_tx_burst (c->conn, data->qid, data->tx_bufs, data->tx_buf_num,
-			&tx);
-      if (err != MEMIF_ERR_SUCCESS)
-	{
-	  INFO ("memif_tx_burst: %s", memif_strerror (err));
-	  goto error;
-	}
-      DBG ("tx: %d/%u", tx, data->tx_buf_num);
-      data->tx_buf_num -= tx;
-    }
-
-error:
-  INFO ("thread %u error!", data->id);
-  goto close;
-
-close:
-  err = memif_refill_queue (c->conn, data->qid, rx, 0);
-  if (err != MEMIF_ERR_SUCCESS)
-    INFO ("memif_buffer_free: %s", memif_strerror (err));
-  data->rx_buf_num -= fb;
-  DBG ("freed %d buffers. %u/%u alloc/free buffers",
-       fb, data->rx_buf_num, MAX_MEMIF_BUFS - data->rx_buf_num);
-  free (data->rx_bufs);
-  free (data->tx_bufs);
-  data->isRunning = 0;
-  INFO ("pthread id %u exit", data->id);
-  pthread_exit (NULL);
-}
-
-void *
-memif_rx_interrupt (void *ptr)
-{
-  memif_thread_data_t *data = (memif_thread_data_t *) ptr;
-  memif_connection_t *c = &memif_connection[data->index];
-  int err;
-  uint16_t rx = 0, tx = 0, fb = 0;
-  struct epoll_event evt;
-  int en = 0;
-  sigset_t sigset;
-
-  signal (SIGUSR1, user_signal_handler);
-
-  data->rx_bufs = malloc (sizeof (memif_buffer_t) * MAX_MEMIF_BUFS);
-  data->tx_bufs = malloc (sizeof (memif_buffer_t) * MAX_MEMIF_BUFS);
-  data->rx_buf_num = 0;
-  data->tx_buf_num = 0;
-
-  data->isRunning = 1;
-  INFO ("pthread id %u starts in interrupt mode", data->id);
-  int thread_epfd = epoll_create (1);
-
-  /* get interrupt queue id */
-  int fd = -1;
-  err = memif_get_queue_efd (c->conn, data->qid, &fd);
-  if (err != MEMIF_ERR_SUCCESS)
-    {
-      INFO ("memif_get_queue_efd: %s", memif_strerror (err));
-      goto error;
-    }
-  add_epoll_fd (thread_epfd, fd, EPOLLIN);
-
-  while (1)
-    {
-      memset (&evt, 0, sizeof (evt));
-      evt.events = EPOLLIN | EPOLLOUT;
-      sigemptyset (&sigset);
-      en = epoll_pwait (thread_epfd, &evt, 1, -1, &sigset);
-      if (en < 0)
-	{
-	  if (errno == EINTR)
-	    goto close;
-	  DBG ("epoll_pwait: %s", strerror (errno));
-	  goto error;
-	}
-      else if (en > 0)
-	{
-	  /* receive data from shared memory buffers */
-	  err =
-	    memif_rx_burst (c->conn, data->qid, data->rx_bufs, MAX_MEMIF_BUFS,
-			    &rx);
-	  if (err != MEMIF_ERR_SUCCESS)
-	    {
-	      INFO ("memif_rx_burst: %s", memif_strerror (err));
-	      data->rx_buf_num += rx;
-	      goto error;
-	    }
-	  data->rx_buf_num += rx;
-	  if (rx == 0)
-	    {
-	      continue;
-	    }
-
-	  DBG ("thread id: %u", data->id);
-
-	  DBG ("received %d buffers. %u/%u alloc/free buffers",
-	       rx, data->rx_buf_num, MAX_MEMIF_BUFS - data->rx_buf_num);
-
-	  err =
-	    memif_buffer_alloc (c->conn, data->qid, data->tx_bufs,
-				data->rx_buf_num, &tx, 0);
-	  if (err != MEMIF_ERR_SUCCESS)
-	    {
-	      INFO ("memif_buffer_alloc: %s", memif_strerror (err));
-	      data->tx_buf_num += tx;
-	      goto error;
-	    }
-	  data->tx_buf_num += tx;
-	  DBG ("allocated %d/%d buffers, %u free buffers",
-	       tx, data->rx_buf_num, MAX_MEMIF_BUFS - data->tx_buf_num);
-
-	  int i;
-	  for (i = 0; i < rx; i++)
-	    {
-	      resolve_packet ((void *) (data->rx_bufs + i)->data,
-			      (data->rx_bufs + i)->len,
-			      (void *) (data->tx_bufs + i)->data,
-			      &(data->tx_bufs + i)->len, c->ip_addr);
-	    }
-
-	  /* mark memif buffers and shared memory buffers as free */
-	  err = memif_refill_queue (c->conn, data->qid, rx, 0);
-	  if (err != MEMIF_ERR_SUCCESS)
-	    INFO ("memif_buffer_free: %s", memif_strerror (err));
-	  data->rx_buf_num -= fb;
-
-	  DBG ("freed %d buffers. %u/%u alloc/free buffers",
-	       fb, data->rx_buf_num, MAX_MEMIF_BUFS - data->rx_buf_num);
-
-	  err =
-	    memif_tx_burst (c->conn, data->qid, data->tx_bufs,
-			    data->tx_buf_num, &tx);
-	  if (err != MEMIF_ERR_SUCCESS)
-	    {
-	      INFO ("memif_tx_burst: %s", memif_strerror (err));
-	      goto error;
-	    }
-	  DBG ("tx: %d/%u", tx, data->tx_buf_num);
-	  data->tx_buf_num -= tx;
-	}
-    }
-
-error:
-  INFO ("thread %u error!", data->id);
-  goto close;
-
-close:
-  err = memif_refill_queue (c->conn, data->qid, rx, 0);
-  if (err != MEMIF_ERR_SUCCESS)
-    INFO ("memif_buffer_free: %s", memif_strerror (err));
-  data->rx_buf_num -= fb;
-  DBG ("freed %d buffers. %u/%u alloc/free buffers",
-       fb, data->rx_buf_num, MAX_MEMIF_BUFS - data->rx_buf_num);
-  free (data->rx_bufs);
-  free (data->tx_bufs);
-  data->isRunning = 0;
-  INFO ("pthread id %u exit", data->id);
-  pthread_exit (NULL);
-
-}
-
-/* informs user about connected status. private_ctx is used by user to identify connection
-    (multiple connections WIP) */
-int
-on_connect (memif_conn_handle_t conn, void *private_ctx)
-{
-  long index = (*(long *) private_ctx);
-  int err, i, ti;
-  INFO ("memif connected! index %ld", index);
-  memif_connection_t *c = &memif_connection[index];
-  c->pending_del = 0;
-
-  for (i = 0; i < MAX_QUEUES; i++)
-    {
-      err = memif_set_rx_mode (c->conn, MEMIF_RX_MODE_POLLING, i);
-      if (err != MEMIF_ERR_SUCCESS)
-	INFO ("memif_set_rx_mode: %s qid: %u", memif_strerror (err), i);
-      else
-	{
-	  ti = (index * MAX_QUEUES) + i;
-	  if (thread_data[ti].isRunning)
-	    {
-	      INFO ("thread id: %d already running!", ti);
-	      continue;
-	    }
-	  thread_data[ti].index = index;
-	  thread_data[ti].qid = i;
-	  thread_data[ti].id = ti;
-	  if ((i % 2) == 0)
-	    pthread_create (&thread[ti],
-			    NULL, memif_rx_poll, (void *) &thread_data[ti]);
-	  else
-	    pthread_create (&thread[ti],
-			    NULL, memif_rx_interrupt,
-			    (void *) &thread_data[ti]);
-	}
-
-    }
-  return 0;
-}
-
-/* informs user about disconnected status. private_ctx is used by user to identify connection
-    (multiple connections WIP) */
-int
-on_disconnect (memif_conn_handle_t conn, void *private_ctx)
-{
-  void *ptr;
-  long index = (*(long *) private_ctx);
-  memif_connection_t *c = &memif_connection[index];
-  int i, ti;
-  INFO ("memif disconnected!");
-  /* inform thread in polling mode about memif disconnection */
-  c->pending_del = 1;
-  for (i = 0; i < MAX_QUEUES; i++)
-    {
-      ti = (index * MAX_QUEUES) + i;
-      if (!thread_data[ti].isRunning)
-	continue;
-      if ((i % 2) != 0)
-	pthread_kill (thread[ti], SIGUSR1);	/* interrupt thread in interrupt mode */
-      pthread_join (thread[ti], &ptr);
-    }
-  return 0;
-}
-
-/* user needs to watch new fd or stop watching fd that is about to be closed.
-    control fd will be modified during connection establishment to minimize CPU usage */
-int
-control_fd_update (int fd, uint8_t events, void *ctx)
-{
-  /* convert memif event definitions to epoll events */
-  if (events & MEMIF_FD_EVENT_DEL)
-    return del_epoll_fd (main_epfd, fd);
-
-  uint32_t evt = 0;
-  if (events & MEMIF_FD_EVENT_READ)
-    evt |= EPOLLIN;
-  if (events & MEMIF_FD_EVENT_WRITE)
-    evt |= EPOLLOUT;
-
-  if (events & MEMIF_FD_EVENT_MOD)
-    return mod_epoll_fd (main_epfd, fd, evt);
-
-  return add_epoll_fd (main_epfd, fd, evt);
-}
-
-int
-icmpr_memif_create (long index)
-{
-  if (index >= MAX_CONNS)
-    {
-      INFO ("connection array overflow");
-      return 0;
-    }
-  if (index < 0)
-    {
-      INFO ("don't even try...");
-      return 0;
-    }
-  memif_connection_t *c = &memif_connection[index];
-
-  /* setting memif connection arguments */
-  memif_conn_args_t args;
-  memset (&args, 0, sizeof (args));
-  args.is_master = 0;
-  args.log2_ring_size = 10;
-  args.buffer_size = 2048;
-  args.num_s2m_rings = 2;
-  args.num_m2s_rings = 2;
-  strncpy ((char *) args.interface_name, IF_NAME, strlen (IF_NAME));
-  args.mode = 0;
-  /* socket filename is not specified, because this app is supposed to
-     connect to VPP over memif. so default socket filename will be used */
-  /* default socketfile = /run/vpp/memif.sock */
-
-  args.interface_id = index;
-  /* last argument for memif_create (void * private_ctx) is used by user
-     to identify connection. this context is returned with callbacks */
-  int err = memif_create (&c->conn,
-			  &args, on_connect, on_disconnect, NULL,
-			  &ctx[index]);
-  if (err != MEMIF_ERR_SUCCESS)
-    {
-      INFO ("memif_create: %s", memif_strerror (err));
-      return 0;
-    }
-
-  c->index = index;
-
-  c->ip_addr[0] = 192;
-  c->ip_addr[1] = 168;
-  c->ip_addr[2] = c->index + 1;
-  c->ip_addr[3] = 2;
-  return 0;
-}
-
-int
-icmpr_memif_delete (long index)
-{
-  if (index >= MAX_CONNS)
-    {
-      INFO ("connection array overflow");
-      return 0;
-    }
-  if (index < 0)
-    {
-      INFO ("don't even try...");
-      return 0;
-    }
-  memif_connection_t *c = &memif_connection[index];
-
-  int err;
-  /* disconnect then delete memif connection */
-  err = memif_delete (&c->conn);
-  if (err != MEMIF_ERR_SUCCESS)
-    INFO ("memif_delete: %s", memif_strerror (err));
-  return 0;
-}
-
-void
-print_help ()
-{
-  printf ("LIBMEMIF EXAMPLE APP: %s", APP_NAME);
-#ifdef ICMP_DBG
-  printf (" (debug)");
-#endif
-  printf ("\n");
-  printf ("==============================\n");
-  printf ("libmemif version: %s", LIBMEMIF_VERSION);
-#ifdef MEMIF_DBG
-  printf (" (debug)");
-#endif
-  printf ("\n");
-  printf ("memif version: %d\n", memif_get_version ());
-  printf ("commands:\n");
-  printf ("\thelp - prints this help\n");
-  printf ("\texit - exit app\n");
-  printf ("\tconn <index> - create memif (slave-mode)\n");
-  printf ("\tdel  <index> - delete memif\n");
-  printf ("\tshow - show connection details\n");
-  printf ("\tip-set <index> <ip-addr> - set interface ip address\n");
-}
-
-int
-icmpr_free ()
-{
-  /* application cleanup */
-  int err;
-  long i;
-  for (i = 0; i < MAX_CONNS; i++)
-    {
-      memif_connection_t *c = &memif_connection[i];
-      if (c->conn)
-	icmpr_memif_delete (i);
-    }
-
-  err = memif_cleanup ();
-  if (err != MEMIF_ERR_SUCCESS)
-    INFO ("memif_delete: %s", memif_strerror (err));
-
-  return 0;
-}
-
-int
-icmpr_set_ip (long index, char *ip)
-{
-  if (index >= MAX_CONNS)
-    {
-      INFO ("connection array overflow");
-      return 0;
-    }
-  if (index < 0)
-    {
-      INFO ("don't even try...");
-      return 0;
-    }
-  memif_connection_t *c = &memif_connection[index];
-  if (c->conn == NULL)
-    {
-      INFO ("no connection at index %ld", index);
-      return 0;
-    }
-
-  char *end;
-  char *ui;
-  uint8_t tmp[4];
-  ui = strtok (ip, ".");
-  if (ui == NULL)
-    goto error;
-  tmp[0] = strtol (ui, &end, 10);
-
-  ui = strtok (NULL, ".");
-  if (ui == NULL)
-    goto error;
-  tmp[1] = strtol (ui, &end, 10);
-
-  ui = strtok (NULL, ".");
-  if (ui == NULL)
-    goto error;
-  tmp[2] = strtol (ui, &end, 10);
-
-  ui = strtok (NULL, ".");
-  if (ui == NULL)
-    goto error;
-  tmp[3] = strtol (ui, &end, 10);
-
-  c->ip_addr[0] = tmp[0];
-  c->ip_addr[1] = tmp[1];
-  c->ip_addr[2] = tmp[2];
-  c->ip_addr[3] = tmp[3];
-
-  INFO ("memif %ld ip address set to %u.%u.%u.%u",
-	index, c->ip_addr[0], c->ip_addr[1], c->ip_addr[2], c->ip_addr[3]);
-
-  return 0;
-
-error:
-  INFO ("invalid ip address");
-  return 0;
-}
-
-
-int
-user_input_handler ()
-{
-  char *in = (char *) malloc (256);
-  char *ui = fgets (in, 256, stdin);
-  char *end;
-  if (in[0] == '\n')
-    goto done;
-  ui = strtok (in, " ");
-  if (strncmp (ui, "exit", 4) == 0)
-    {
-      free (in);
-      icmpr_free ();
-      exit (EXIT_SUCCESS);
-    }
-  else if (strncmp (ui, "help", 4) == 0)
-    {
-      print_help ();
-      goto done;
-    }
-  else if (strncmp (ui, "conn", 4) == 0)
-    {
-      ui = strtok (NULL, " ");
-      if (ui != NULL)
-	icmpr_memif_create (strtol (ui, &end, 10));
-      else
-	INFO ("expected id");
-      goto done;
-    }
-  else if (strncmp (ui, "del", 3) == 0)
-    {
-      ui = strtok (NULL, " ");
-      if (ui != NULL)
-	icmpr_memif_delete (strtol (ui, &end, 10));
-      else
-	INFO ("expected id");
-      goto done;
-    }
-  else if (strncmp (ui, "show", 4) == 0)
-    {
-      print_memif_details ();
-      goto done;
-    }
-  else if (strncmp (ui, "ip-set", 6) == 0)
-    {
-      ui = strtok (NULL, " ");
-      if (ui != NULL)
-	icmpr_set_ip (strtol (ui, &end, 10), strtok (NULL, " "));
-      else
-	INFO ("expected id");
-      goto done;
-    }
-  else
-    {
-      DBG ("unknown command: %s", ui);
-      goto done;
-    }
-
-  return 0;
-done:
-  free (in);
-  return 0;
-}
-
-int
-poll_event (int timeout)
-{
-  struct epoll_event evt;
-  int app_err = 0, memif_err = 0, en = 0;
-  uint32_t events = 0;
-  memset (&evt, 0, sizeof (evt));
-  evt.events = EPOLLIN | EPOLLOUT;
-  sigset_t sigset;
-  sigemptyset (&sigset);
-  en = epoll_pwait (main_epfd, &evt, 1, timeout, &sigset);
-  if (en < 0)
-    {
-      DBG ("epoll_pwait: %s", strerror (errno));
-      return -1;
-    }
-  if (en > 0)
-    {
-      /* this app does not use any other file descriptors than stds and memif control fds */
-      if (evt.data.fd > 2)
-	{
-	  /* event of memif control fd */
-	  /* convert epoll events to memif events */
-	  if (evt.events & EPOLLIN)
-	    events |= MEMIF_FD_EVENT_READ;
-	  if (evt.events & EPOLLOUT)
-	    events |= MEMIF_FD_EVENT_WRITE;
-	  if (evt.events & EPOLLERR)
-	    events |= MEMIF_FD_EVENT_ERROR;
-	  memif_err = memif_control_fd_handler (evt.data.fd, events);
-	  if (memif_err != MEMIF_ERR_SUCCESS)
-	    INFO ("memif_control_fd_handler: %s", memif_strerror (memif_err));
-	}
-      else if (evt.data.fd == 0)
-	{
-	  app_err = user_input_handler ();
-	}
-      else
-	{
-	  DBG ("unexpected event at memif_epfd. fd %d", evt.data.fd);
-	}
-    }
-
-  if ((app_err < 0) || (memif_err < 0))
-    {
-      if (app_err < 0)
-	DBG ("user input handler error");
-      if (memif_err < 0)
-	DBG ("memif control fd handler error");
-      return -1;
-    }
-
-  return 0;
-}
-
-int
-main ()
-{
-  main_epfd = epoll_create (1);
-  add_epoll_fd (main_epfd, 0, EPOLLIN);
-
-  /* initialize memory interface */
-  int err, i;
-  /* if valid callback is passed as argument, fd event polling will be done by user
-     all file descriptors and events will be passed to user in this callback */
-  /* if callback is set to NULL libmemif will handle fd event polling */
-  err = memif_init (control_fd_update, APP_NAME, NULL, NULL, NULL);
-  if (err != MEMIF_ERR_SUCCESS)
-    INFO ("memif_init: %s", memif_strerror (err));
-
-  for (i = 0; i < MAX_CONNS; i++)
-    {
-      memif_connection[i].conn = NULL;
-      ctx[i] = i;
-    }
-
-  memset (&thread_data, 0, sizeof (memif_thread_data_t) * MAX_THREADS);
-
-  print_help ();
-
-  /* main loop */
-  while (1)
-    {
-      if (poll_event (-1) < 0)
-	{
-	  DBG ("poll_event error!");
-	}
-    }
-}